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Molecular Studies of Thamnophiine Snakes: 1. The Phylogeny of the Genus Nerodia

Robin Lawson
Journal of Herpetology
Vol. 21, No. 2 (Jun., 1987), pp. 140-157
DOI: 10.2307/1564474
Stable URL: http://www.jstor.org/stable/1564474
Page Count: 18
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Molecular Studies of Thamnophiine Snakes: 1. The Phylogeny of the Genus Nerodia
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Abstract

Multiple method analyses of allozyme frequency data from all species of the genera Nerodia and Regina, and a representative of the genus Thamnophis, are in close agreement. Nerodia is seen to be composed of three distinct lineages, the taxispilota group, the cyclopion group, and the sipedon group. The sipedon group includes the genus Thamnophis, and thus the genus Nerodia is paraphyletic. The genus Regina is also composed of three lineages, at least two of which appear distinct from Nerodia. Taxonomic rearrangements are suggested on the basis of these findings.

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